Need help identifying this engine noise. Serpentine has been removed to isolate sound. VTech screens have been checked and cleaned. Rockers have been inspected. No scaring on camshaft. Nothing appears out of the ordinary. Timing chain and timing marks have been checked for alignment. Makes noise through range of temperatures including, cold, warm, hot.
Replaced: VTEC Solenoid Spool Valve + Gasket
Was throwing this code before code cleared:
MANAGEMENT SYSTEM STUCK OFF 3. VTECH OIL PRESSURE SWITCH CIRCUIT MALFUNCTION. 1. ROCKER ARM OIL CONTROL VALVE (A) STUCK ON/OFF 2. VARIABLE CYLINDER
Engine has 166K Miles.
Thanks for your help!!